FireBreak is a Firefox add-on that provides an easy way to find the break points in your responsive designs.
Are you struggling to find that exact pixel where your design breaks? Simply install FireBreak and you will find those break points in no time.
Instead of using you mouse to resize the browser window you can now use your keyboard.
Just hit Alt + Left Arrow to make the window 1px narrower and Alt + Right Arrow to make it wider. Throwing in the Shift key there as well will make it decrease and increase its width by 10px instead.
Furthermore, when you find your break point the tiny icon in the toolbar will tell you the exact width of you browser window.
FireBreak is cross-platform and it works on Mac OS X, Windows and Linux.
· Firefox 3.6 and later
What's New in This Release: [ read full changelog ]
· Changed to innerWidth to make sure the extension behaves the same way on all platforms.